EP3038728B1 - Dispositif de filtrage pour fluides - Google Patents

Dispositif de filtrage pour fluides Download PDF

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Publication number
EP3038728B1
EP3038728B1 EP14735861.8A EP14735861A EP3038728B1 EP 3038728 B1 EP3038728 B1 EP 3038728B1 EP 14735861 A EP14735861 A EP 14735861A EP 3038728 B1 EP3038728 B1 EP 3038728B1
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EP
European Patent Office
Prior art keywords
filter
flow
guide
inflow chamber
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14735861.8A
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German (de)
English (en)
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EP3038728A1 (fr
Inventor
Marco Bautz
Gerhard Stehle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RT Filtertechnik GmbH
Original Assignee
RT Filtertechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP3038728A1 publication Critical patent/EP3038728A1/fr
Application granted granted Critical
Publication of EP3038728B1 publication Critical patent/EP3038728B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/908—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding provoking a tangential stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/23—Supported filter elements arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/06—Filters making use of electricity or magnetism

Definitions

  • the invention relates to a filter device for fluids, in particular in the form of a tank built-in return filter, with the features in the preamble of claim 1.
  • Such filter devices are state of the art and available on the market in a large number of designs and embodiments. They serve, among other things, to filter contamination in fluids, such as hydraulic oil, out of them. Contamination of the hydraulic oil occurs during assembly and commissioning of the respective hydraulic system, and in addition to this initial contamination, contamination can occur during operation, for example through the penetration of dirt on the hydraulic tank due to insufficient tank ventilation, pipe penetrations, piston rod seals and the like.
  • it can be useful to initiate the filtration of returning fluids directly in the area of the hydraulic tank for example by installing the filter device as a return filter directly in the tank.
  • the document DE 10 2004 014 149 B4 discloses an example of such an in-tank filter.
  • the U.S. 4,657,671 describes a filter device for fluids, in particular in the form of a built-in tank return filter, with at least one filter element which can be accommodated in a housing which has a fluid inlet for the supply of unfiltrate to an inner cavity of the respective filter element through which a filter medium can flow through the unfiltrate is surrounded, wherein between the fluid inlet and the inner cavity of the respective filter element, a flow guide device is provided which aligns the flow of the unfiltrate reaching the filter medium.
  • the U.S. 3,353,678 shows a filter element for use in such a filter device, which has an end cap with an opening leading to the inner filter cavity of the filter element, a flow guide body with guide vanes which can flow against and cause the flow to rotate is provided at the opening.
  • the EP 1 872 842 A1 describes a filter device for fluids, in particular in the form of a tank built-in return filter, with the features in the preamble of claim 1 with at least one filter element which can be received in a housing which has a fluid inlet for the supply of unfiltered material to an inner cavity of the respective filter element , which is surrounded by a filter medium through which the unfiltrate can flow and which delimits a cylindrical cavity, with a flow guide device being provided between the fluid inlet and the inner cavity of the respective filter element, which aligns the flow of the unfiltrate reaching the filter medium and has guide means for generating a swirl flow which rotates around the cylinder axis in the cavity, the flow guide device having an inflow chamber upstream of the swirl-generating guide means, into which the unfiltrate enters with the inflow direction predetermined by a connection device and from which the unfiltrate with changed compared to the inflow direction Direction of flow arrives at the swirl-generating guide means.
  • a filter device with a magnetic candle is in the GB 562 175 shown.
  • the object of the invention is to provide a filter device of the type mentioned at the beginning, which is characterized by particularly favorable operating behavior.
  • this object is achieved by a filter device which has the features of claim 1 in its entirety.
  • an essential feature of the invention is that a magnetic candle or sensors are located within the cavity of the filter element.
  • the flow guide device has an inflow chamber upstream of the swirl-generating guide means, into which the unfiltrate enters with the inflow direction specified by a connection device and from which the unfiltrate reaches the swirl-generating guide means with a flow direction that is different from the inflow direction.
  • the deflection of the inflowing fluid flow taking place in the inflow chamber leads to a flow stabilization before the unfiltrate reaches the swirl-generating guide means.
  • a flow guide device is provided between the fluid inlet through which the unfiltrate flows into the filter device and the inner cavity of the respective filter element, which aligns the flow of the unfiltrate reaching the filter medium.
  • Targeted influencing of the direction of flow is more uniform Pressure and flow distribution within the filter element can be achieved.
  • the longest possible dwell time of the fluid within the cavity of the filter element and along additional elements located in the filter cavity, ie along the magnetic candle or the sensors can be achieved.
  • the flow guiding device particularly advantageously has guide means for generating a swirl flow which rotates in the cavity around the cylinder axis. This enables a particularly long dwell time along magnetic candles and thus an efficient separation of ferromagnetic particles from the fluid.
  • the swirl-generating guide means can have, as a functional stage, a guide body located in the inflow chamber, forming the flow path from this to an opening of the associated end cap of the relevant filter element, into which the unfiltrate can flow from the inflow chamber via an opening facing away from the connection device and which has inner guide surfaces which run spirally to the axis to generate swirl.
  • a swirl flow rotating around the axis is generated within the area of the inflow chamber and even before the fluid reaches its filter cavity via the end cap of the filter element.
  • the arrangement can particularly advantageously be made such that the swirl-generating guide means have, as a further functional stage, guide vane-like swirl elements which are located at the opening of the end cap leading to the filter cavity are located. The rotation of the flow is therefore further intensified directly at the element entrance.
  • the inflow chamber can advantageously be arranged on the top of a fluid tank that forms the clean side during the filtering process, a bottom formed by a tank wall section in which there is an installation opening for the filter housing protruding into the tank, as well as a removable one opposite the installation opening Have housing cover.
  • the housing cover thus not only forms a closure for the inflow chamber, but also functions as a maintenance and service opening for installing and removing the filter element when changing the filter element.
  • the guide body having the spirally extending guide surfaces, which forms the first functional stage of the swirl-generating means, can advantageously extend from the underside of the housing cover to the contact with the end cap of the filter element in the functional position.
  • the guide body thereby not only forms the fluid guide, but can also serve as a holding element that holds the filter element in the filter housing in its functional position.
  • the guide body can be attached to the housing cover and have a coaxial passage through which a carrier of a magnetic candle fixed on the housing cover extends into the inner cavity of the relevant filter element.
  • the filter housing can advantageously be fixed with a fastening flange on the installation opening formed in the bottom of the inflow chamber, forming a seal which separates the inflow chamber on the dirt side from the tank on the clean side.
  • the filter housing can have a wall section extending from its fastening flange through the inflow chamber to the housing cover, which forms a baffle wall which is arranged opposite the connection device for the unfiltrate located on the chamber wall.
  • the Fig. 1 shows a tank 1 storing a fluid such as hydraulic oil with an exemplary embodiment of the filter device built therein in the form of a tank built-in return filter.
  • the filter device has a hollow cylinder-like filter housing 3 which is open at its lower end 5 towards the tank contents. This open end 5 forms the outlet on the clean side, through which the cleaned fluid reaches the tank contents from the filter housing 3.
  • the filter housing 3 At the upper end of the filter housing 3, the latter has a fastening flange 7 with which it is fastened to an installation opening 9 by screwing.
  • the installation opening 9 is located in an upper tank wall section in the form of a flat floor 11 of an inflow chamber 13 which is provided on the upper side of the tank 1, slightly recessed.
  • the inflow chamber 13 has the shape of a rectangular box.
  • connection device 17 via which unfiltrate can flow into the chamber 13 with an inflow direction which runs parallel to the bottom 11 and to the long sides of the chamber 13.
  • a plurality of inflow channels running parallel to one another are provided in the connection device 17, of which the one in the direction of view of the Fig. 1 seen foremost channel opening is shown in section.
  • the inflow chamber 13 can be closed by a removable housing cover 19, which is coaxial with the longitudinal axis of the filter housing 3 and closes a housing opening 21 which is larger in diameter than the installation opening 9 in the base 11.
  • the fastening flange 7 of the filter housing 3 forms on its inside a seat surface 23 for the sealed contact of the associated end cap 25 of a filter element 27, whereby the end cap 25, as usual, forms an enclosure for the facing end of a hollow cylindrical filter medium 29 which has an inner filter cavity 31 which forms the dirt side during the filtering process. Accordingly, the space 33 between the outer side of the filter medium 29 and the inner wall of the filter housing 3 forms the clean side, from which the filtered fluid passes through the lower, open one End 5 emerges from the filter housing 3 and reaches the tank contents.
  • the dirt-side cavity 31 of the filter element 27 is protected against excessive pressure build-up by means of a bypass valve 35 ( Fig. 1 ), which is located on the lower end cap 37 of the filter element 27, a dirt collecting basket 39 projecting into the filter cavity 31 being provided at this opening.
  • the inflow chamber 13 forms a space which calms and aligns the unfiltrate flow entering via the connection device 17, the inflow direction of which is indicated by flow arrows 41.
  • the inflow chamber 13 has a wall section 43 as a guide element, which, starting from the fastening flange 7 of the filter housing 3, extends in the form of a circular surface section through the inflow chamber 13 to an annular body 45 located on the inside of the housing cover 19.
  • the wall section 43 forming a baffle wall extends over such an arc length that it can be flown around laterally along the long sides of the inflow chamber 13.
  • the filter device has swirl-generating guide means in two functional stages.
  • the first functional stage is formed by a guide body 49, which in Fig. 4 is shown separately.
  • the guide body 49 has guide surfaces 51 within a hollow cylinder, which have a spiral course in relation to the longitudinal axis, so that a swirl is generated with an axial flow, so that the flow rotates around the longitudinal axis .
  • entry windows 53 are formed in the wall of the guide body 49, which run at an angle to the axis.
  • the guide surfaces 51 are delimited by axially extending wall parts 55 which are attached to an inner ring 57 and 59 at the upper and lower ends which limit a central passage through the guide body 49.
  • the guide body 49 is attached to the underside of the housing cover 19 with the edge 61 at the top in the figures.
  • one end of the carrier 65 of a magnetic candle is also attached, which has a group of permanent magnets 67 in the manner customary with magnetic candles and, with the housing cover 19 attached, extends into the filter cavity 31 up to the vicinity of the dirt collecting basket 39 extends.
  • the carrier 65 extends through the inner passage of the guide body 49 and the opening 75 of the end cap 25.
  • a sensor 69 at the lower end of the magnetic candle enables the quality of the hydraulic oil to be monitored.
  • the amount of ferritic particles collected by the magnets 67 can be indicated by means of a sensor 71.
  • an RFID sensor 73 can be provided on the inside of the end cap 37, which provides recognition of the filter element 27.
  • a further swirl-generating device is provided at the opening 75 of the end cap 25 leading to the filter cavity 31, which device has guide vanes 77 which are arranged in the manner of turbine blades in an annular channel 79.
  • the channel 79 is delimited by a connecting piece 81 of the end cap 25 which, in the functional position, is penetrated by the support 65 of the magnetic candle.
  • a connection plate 82 surrounding the channel 79 ( Fig. 5 ), which has a protruding ring 83 surrounding the channel 79.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Filtration Of Liquid (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Claims (8)

  1. Installation de filtration de fluide, notamment sous la forme d'un filtre d'incorporation à un réservoir, comprenant au moins un élément (27) de filtre pouvant être logé dans une enveloppe (3), qui a une entrée (17) de fluide pour l'envoi de non filtrat à une cavité (31) intérieure de l'élément (27) de filtre entouré d'un milieu (29) filtrant pouvant être traversé par le non filtrat et délimitant une cavité (31) cylindrique, dans laquelle entre l'entrée (17) de fluide et la cavité (31) intérieure de l'élément (27) de filtre respectif est prévu un dispositif (13, 49, 77) de conduite d'écoulement dirigeant l'écoulement du non filtrat arrivant au milieu (29) filtrant et ayant des moyens (49, 77) de conduite pour produire un écoulement tourbillonnaire qui tourne dans la cavité (31) autour de l'axe du cylindre, le dispositif de conduite d'écoulement ayant, en amont des moyens (49, 77) de conduite produisant un tourbillon, une chambre (13) d'afflux dans laquelle le non filtrat entre en ayant la direction (41) d'afflux prescrite par un dispositif (17) de raccordement et dont le non filtrat parvient, en ayant une direction (47) découlement modifié par rapport à la direction (41) d'afflux, aux moyens (49, 77) de conduite produisant un tourbillon, caractérisé en ce qu'une bougie magnétique ou des capteurs se trouvent à l'intérieur de la cavité (31) de l'élément (27) de filtre.
  2. Installation de filtration suivant la revendication 1, caractérisée en ce que les moyens de conduite produisant un tourbillon ont comme étage fonctionnel un corps (49) de conduite qui se trouve dans la chambre (13) d'afflux, qui forme le trajet d'écoulement de celle-ci à une ouverture (75) de la coiffe (25) d'extrémité associée de l'élément (27) de filtre concerné, dans lequel le non filtrat peut de la chambre (13) d'afflux entrer par une ouverture loin du dispositif (17) de raccordement et qui a les surfaces (51) de conduite intérieure qui, pour la production d'un tourbillon, s'étendent en spirale par rapport à l'axe.
  3. Installation de filtration suivant l'une des revendications 1 ou 2, caractérisée en ce que les moyens de conduite produisant un tourbillon ont comme autre étage fonctionnel des éléments (77) de tourbillonnement de type à palette directrice, qui se trouvent sur l'ouverture (75), menant à la cavité (31) du filtre, de la coiffe (25) d'extrémité.
  4. Installation de filtration suivant l'une des revendications précédentes, caractérisée en ce que la chambre (13) d'afflux est disposée du côté supérieur d'un réservoir (1) à fluide formant le côté propre lors de l'opération de filtration, a un fond (11) qui est formé par une partie de paroi du réservoir et dans lequel il y a une ouverture (9) de montage de l'enveloppe (3) de filtre pénétrant dans le réservoir (1) ainsi qu'un couvercle (19) d'enveloppe opposé à l'ouverture (9) de montage et pouvant être retiré.
  5. Installation de filtration suivant l'une des revendications 2 à 4, caractérisée en ce que le corps (49) de conduite, ayant des surfaces (51) de conduite s'étendant en spirale, s'étend du côté inférieur du couvercle (19) de l'enveloppe jusqu'à s'appliquer à la coiffe (25) d'extrémité de l'élément (27) de filtre se trouvant en position de fonctionnement.
  6. Installation de filtration suivant l'une des revendications 2 à 5, caractérisée en ce que le corps (49) de conduite est mis sur le couvercle (19) de l'enveloppe et a un passage coaxial dans lequel s'étend un support (65), fixé au couvercle (19) de l'enveloppe, d'une bougie magnétique dans la cavité (31) intérieure de l'élément (27) de filtre concerné.
  7. Installation de filtration suivant l'une des revendications 4 à 6, caractérisée en ce que l'enveloppe (3) du filtre est fixée par une bride (7) de fixation à l'ouverture (9) de montage formée au fond (11) de la chambre (13) d'afflux, en formant une étanchéité qui sépare la chambre (13) d'afflux du côté sale du réservoir (1) du côté propre.
  8. Installation de filtration suivant la revendication 7, caractérisée en ce que l'enveloppe (3) du filtre a une partie (43) de paroi, qui s'étend de sa bride (7) de fixation au couvercle (9) de l'enveloppe en passant par la chambre (13) d'afflux et qui forme une paroi de rebondissement, qui est disposée à l'opposé du dispositif (7) de raccordement pour le non filtrat se trouvant sur la paroi de la chambre.
EP14735861.8A 2013-08-30 2014-07-05 Dispositif de filtrage pour fluides Active EP3038728B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013014453.1A DE102013014453A1 (de) 2013-08-30 2013-08-30 Filtervorrichtung für Fluide
PCT/EP2014/001852 WO2015014432A1 (fr) 2013-07-30 2014-07-05 Dispositif de filtrage pour fluides

Publications (2)

Publication Number Publication Date
EP3038728A1 EP3038728A1 (fr) 2016-07-06
EP3038728B1 true EP3038728B1 (fr) 2021-01-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14735861.8A Active EP3038728B1 (fr) 2013-08-30 2014-07-05 Dispositif de filtrage pour fluides

Country Status (6)

Country Link
US (1) US10617981B2 (fr)
EP (1) EP3038728B1 (fr)
JP (1) JP2016531745A (fr)
CN (1) CN105492099B (fr)
DE (1) DE102013014453A1 (fr)
WO (1) WO2015014432A1 (fr)

Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
DE102015102464B4 (de) * 2015-02-20 2019-08-14 Lisa Dräxlmaier GmbH Filter für Hydrauliköl, sowie Spritzgusswerkzeug und Zwischenstück mit diesem Filter
DE102016006509A1 (de) 2016-05-28 2017-11-30 Hydac Process Technology Gmbh Filtervorrichtung für Fluide
JP2018086625A (ja) * 2016-11-29 2018-06-07 ヤマシンフィルタ株式会社 フィルタ装置及び濾過装置
DE102017004174A1 (de) * 2017-04-27 2018-10-31 Rt-Filtertechnik Gmbh Filtervorrichtung
DE102017217801A1 (de) 2017-10-06 2019-04-11 BSH Hausgeräte GmbH Wasserführendes Haushaltsgerät und Verfahren zum Betreiben eines wasserführenden Haushaltsgeräts
IT201800006003A1 (it) * 2018-06-04 2019-12-04 Dispositivo di filtraggio
CN112236208A (zh) * 2018-06-04 2021-01-15 液体循环***专利责任有限公司 过滤装置
IT201800009641A1 (it) * 2018-10-19 2020-04-19 Hydronic Patents Srl Dispositivo di filtraggio
US11351486B2 (en) * 2019-07-17 2022-06-07 Walter Tom Kemmer Internal reticulated foam filter for a water filtration tank

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EP1872842A1 (fr) * 2006-06-30 2008-01-02 Eaton Corporation Tamis de rinçage doté d'un mécanisme de flux cyclonique

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EP1872842A1 (fr) * 2006-06-30 2008-01-02 Eaton Corporation Tamis de rinçage doté d'un mécanisme de flux cyclonique

Also Published As

Publication number Publication date
WO2015014432A1 (fr) 2015-02-05
DE102013014453A1 (de) 2015-03-05
JP2016531745A (ja) 2016-10-13
CN105492099A (zh) 2016-04-13
CN105492099B (zh) 2018-12-04
WO2015014432A8 (fr) 2015-04-16
EP3038728A1 (fr) 2016-07-06
US20160184746A1 (en) 2016-06-30
US10617981B2 (en) 2020-04-14

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